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This is done by adding a reorder optimizer that estimates the probability of receiving reordered packets. The optimal delay is decided by balancing the cost of increasing the delay against the probability of missing a reordered packet, resulting in a loss. This balance is decided using the `ms_per_loss_percent` parameter. The usage and parameters can be controlled via field trial. Bug: webrtc:10178 Change-Id: Ic484df0412af35610e74b3a6070f2bac7a926a63 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/231541 Reviewed-by: Ivo Creusen <ivoc@webrtc.org> Commit-Queue: Jakob Ivarsson <jakobi@webrtc.org> Cr-Commit-Position: refs/heads/main@{#34954}
43 lines
1.4 KiB
C++
43 lines
1.4 KiB
C++
/*
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* Copyright (c) 2021 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_AUDIO_CODING_NETEQ_REORDER_OPTIMIZER_H_
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#define MODULES_AUDIO_CODING_NETEQ_REORDER_OPTIMIZER_H_
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#include "absl/types/optional.h"
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#include "modules/audio_coding/neteq/histogram.h"
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namespace webrtc {
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// Calculates an optimal delay to reduce the chance of missing reordered
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// packets. The delay/loss trade-off can be tune using the `ms_per_loss_percent`
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// parameter.
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class ReorderOptimizer {
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public:
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ReorderOptimizer(int forget_factor,
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int ms_per_loss_percent,
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absl::optional<int> start_forget_weight);
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void Update(int relative_delay_ms, bool reordered, int base_delay_ms);
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absl::optional<int> GetOptimalDelayMs() const { return optimal_delay_ms_; }
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void Reset();
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private:
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int MinimizeCostFunction(int base_delay_ms) const;
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Histogram histogram_;
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const int ms_per_loss_percent_;
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absl::optional<int> optimal_delay_ms_;
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_CODING_NETEQ_REORDER_OPTIMIZER_H_
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